China 3-Tab Style Fiberglass Reinforced Asphalt Shingles for Exposed Roofing, Find details about China 3-Tab Style Asphalt Shingles, Asphalt Shingle for Roofing Waterproofing from 3-Tab Style Fiberglass Reinforced Asphalt Shingles for Exposed Roofing
Underlayment: At standard slopes (4" per foot or greater) a shingle underlayment is needed. Yosaite
Waterproof breathable membrane (WBM110). On low slopes (2" to 4" per foot), PE waterproof membrane
(OM400) and Self-adhesive bitumen membrane (BMS030A) are recommended to use.